当我运行heroku运行rake数据库时出现此错误：在生产中迁移 [英] I get this error when i run heroku run rake db:migrate in production

问题描述

当我运行heroku运行rake db时，出现此错误：在生产中迁移。
DEPRECATION警告： config.serve_static_files 已弃用，并将在Rails 5.1中删除。
请改用 config.public_file_server.enabled = true 。
（在/app/config/environments/production.rb:25中调用block）

我在这里尝试了一些解决方案，但是我可以' t解决问题。

这是我的production.rb文件

  Rails.application.configure do＃这里指定的设置优先于config / application.rb中的设置。 ＃代码不会在请求之间重新加载。 config.cache_classes = true＃启动时加载代码。这种渴望将大多数Rails和＃应用程序加载到内存中，允许线程Web服务器＃和那些依赖写入时复制的服务器执行得更好。 ＃Rake任务会自动忽略此选项的性能。 config.eager_load = true＃完全错误报告被禁用并且缓存打开。 config.consider_all_requests_local = false config.action_controller.perform_caching = true＃启用Rack :: Cache在应用程序前放置一个简单的HTTP缓存＃在启用此缓存之前，将`rack-cache`添加到您的Gemfile中。 ＃对于大规模生产使用，请考虑使用缓存逆向代理，如＃NGINX，清漆或鱿鱼。 ＃config.action_dispatch.rack_cache = true＃默认情况下禁止从`/ public`文件夹中提供静态文件，因为＃Apache或NGINX已经处理了这个文件。 config.serve_static_files = ENV ['RAILS_SERVE_STATIC_FILES']。present？ ＃压缩JavaScript和CSS。 config.assets.js_compressor =：uglifier＃config.assets.css_compressor =：sass＃如果预编译的资源丢失，不要回退到资产管道。 config.assets.compile = true＃资产摘要允许您为所有资产设置远期HTTP过期日期，＃但仍可通过摘要参数过期。 config.assets.digest = true＃`config.assets.precompile`和`config.assets.version`已移至config / initializers / assets.rb＃指定服务器用于发送文件的标头。 ＃config.action_dispatch.x_sendfile_header ='X-Sendfile'＃for Apache＃config.action_dispatch.x_sendfile_header ='X-Accel-Redirect'＃for NGINX＃强制通过SSL访问应用程序，使用Strict-Transport-Security，以及使用安全的cookie。 config.force_ssl = true＃使用最低日志级别来确保问题出现时诊断信息＃的可用性。 config.log_level =：debug＃在所有日志行上加上以下标签。 ＃config.log_tags = [：subdomain，：uuid]＃使用不同的记录器进行分布式设置。 ＃config.logger = ActiveSupport :: TaggedLogging.new（SyslogLogger.new）＃在生产中使用不同的缓存存储。 ＃config.cache_store =：mem_cache_store＃启用来自资产服务器的图片，样式表和JavaScript的服务。 ＃config.action_controller.asset_host ='http://assets.example.com'＃忽略不良的电子邮件地址，不要引发电子邮件传递错误。 ＃将其设置为true并配置电子邮件服务器以立即投递，以引发投递错误。 ＃config.action_mailer.raise_delivery_errors = false＃为I18n启用语言环境回退（当无法找到翻译时，查找任何语言环境回落到＃the I18n.default_locale）。 config.i18n.fallbacks = true＃发送弃用声明给已注册的侦听器。 config.active_support.deprecation =：notify＃使用默认日志记录格式化程序，以便不抑制PID和时间戳记。 config.log_formatter = :: Logger :: Formatter.new＃迁移后不要转储模式。 config.active_record.dump_schema_after_migration = falseend  

解决方案

是的，用这个替换弃用的代码：

  config.public_file_server.enabled = ENV ['RAILS_SERVE_STATIC_FILES']。当下？ 
  

来源： https://devcenter.heroku.com/articles/getting-started-with-rails5#heroku-gems

I get this error when i run heroku run rake db:migrate in production. DEPRECATION WARNING: config.serve_static_files is deprecated and will be removed in Rails 5.1. Please use config.public_file_server.enabled = true instead. (called from block in at /app/config/environments/production.rb:25)

I have tried some solution here on stackoverflow but i can't fix the problem.

Here is my production.rb file

Rails.application.configure do
  # Settings specified here will take precedence over those in config/application.rb.

  # Code is not reloaded between requests.
  config.cache_classes = true

  # Eager load code on boot. This eager loads most of Rails and
  # your application in memory, allowing both threaded web servers
  # and those relying on copy on write to perform better.
  # Rake tasks automatically ignore this option for performance.
  config.eager_load = true

  # Full error reports are disabled and caching is turned on.
  config.consider_all_requests_local       = false
  config.action_controller.perform_caching = true

  # Enable Rack::Cache to put a simple HTTP cache in front of your application
  # Add `rack-cache` to your Gemfile before enabling this.
  # For large-scale production use, consider using a caching reverse proxy like
  # NGINX, varnish or squid.
  # config.action_dispatch.rack_cache = true

  # Disable serving static files from the `/public` folder by default since
  # Apache or NGINX already handles this.
  config.serve_static_files = ENV['RAILS_SERVE_STATIC_FILES'].present?

  # Compress JavaScripts and CSS.
  config.assets.js_compressor = :uglifier
  # config.assets.css_compressor = :sass

  # Do not fallback to assets pipeline if a precompiled asset is missed.
  config.assets.compile = true

  # Asset digests allow you to set far-future HTTP expiration dates on all assets,
  # yet still be able to expire them through the digest params.
  config.assets.digest = true

  # `config.assets.precompile` and `config.assets.version` have moved to config/initializers/assets.rb

  # Specifies the header that your server uses for sending files.
  # config.action_dispatch.x_sendfile_header = 'X-Sendfile' # for Apache
  # config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # for NGINX

  # Force all access to the app over SSL, use Strict-Transport-Security, and use secure cookies.
   config.force_ssl = true

  # Use the lowest log level to ensure availability of diagnostic information
  # when problems arise.
  config.log_level = :debug

  # Prepend all log lines with the following tags.
  # config.log_tags = [ :subdomain, :uuid ]

  # Use a different logger for distributed setups.
  # config.logger = ActiveSupport::TaggedLogging.new(SyslogLogger.new)

  # Use a different cache store in production.
  # config.cache_store = :mem_cache_store

  # Enable serving of images, stylesheets, and JavaScripts from an asset server.
  # config.action_controller.asset_host = 'http://assets.example.com'

  # Ignore bad email addresses and do not raise email delivery errors.
  # Set this to true and configure the email server for immediate delivery to raise delivery errors.
  # config.action_mailer.raise_delivery_errors = false

  # Enable locale fallbacks for I18n (makes lookups for any locale fall back to
  # the I18n.default_locale when a translation cannot be found).
  config.i18n.fallbacks = true

  # Send deprecation notices to registered listeners.
  config.active_support.deprecation = :notify

  # Use default logging formatter so that PID and timestamp are not suppressed.
  config.log_formatter = ::Logger::Formatter.new

  # Do not dump schema after migrations.
  config.active_record.dump_schema_after_migration = false
end

解决方案

Yes, replace the deprecated code with this:

 config.public_file_server.enabled = ENV['RAILS_SERVE_STATIC_FILES'].present?

Source: https://devcenter.heroku.com/articles/getting-started-with-rails5#heroku-gems

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